Block forming mold



Sept. 19, 1933- c. H. ROTHMANN BLOCK FORMING MOLD Filed Jan. 19, 1929y 2 sheets-sheet 1 .M M m T o,....mw n F A gzfm Aww. m v 4 Bf M 9..... .g Z w1 j i, W 7

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BLOCK FORMING MOLD Filed Jan. 19, 1929 2 Sheets-Sheet 2 IN VEN TOR. CHA/7L E5 iTA/MA NN Mgffhzm A TTORNEYS.

Patented Sept. 19, 1933 clair/131') STATES BLOCKv FORMING VMOLD Charles Rothmann, Closter, N. J., assignor *l to American Curb-Gutter Block Co. Inc., New York, N. Y., a corporation Application January 19, 1929. serial No; 333,606

l 2 Claims. (Cl. 25-121) I l This invention relates to a block formingmold, and has for `one of its objects to provide a novel and highly efficient machine-of this character which shall be especially adapted to be used for the purpose of manufacturing the curb and gutter forming block constituting the subject matter of my copending application; filed July 12, 1928,and seriallyr numbered 292,169.

` Theinvention has for a further object to provide a mold ofthe character stated which shall be adapted to permit the concrete, from which the block is made, to be subjected to very high pressure so as to Ipermit the block-to be formed Without pores and thus rendery it water' proof and exceedingly strong.

the nature of which will appear vas the description proceeds, the invention consists inthe construction, combination and arrangement of parts tical plane indicated by the linefS-S of Fig-I ure 2; 1 i

v.Figure 4 is a sectional view taken on the vertical planes indicated by the line4-4 of Figure 3;

' Figure 5 is a sectional view taken on the horizontal plane indicated-,bythe line 5 5 of Figure 1;

Figure 6 is a sectional` View taken on the, `vertical planes indicated by the Ylines` 6-6 of'Y Figure 3;

Figure 7 is a view similar to Figure 3 with the door or front side of thermoldV in Aopened or lowered position; E Y

I Figure 8 is a sectional View taken on the horizontal vplane indicated bythe linevB-lof Fig- I numeral 1. is made from metal and mounted in the concrete `base 2.

8 of `angular formation in cross section and lem-v upon a concrete base 2. The mold 1 comprises a rear wall 3, sidewalls 4 and a front wall or door 5. Therside wails 4 Yare provided at their front and rear edgeswithoutwardly directed reinforcing and'strengthening anges V6.v The flanges 6 extend throughout the entireheight of the side walls 4. `Bolts 7, functioning to retain the rear wall 3 and the side Walls 4in assembled. relation, pass through the rear Wall and through those ilanges' that'are locatedat the-rear edges PATENT l oil-"Fica 1 of the side Walls. The lower, end portions of l the rear wall and the side walls 4 are embedded Anchoring ,l elements bedded in the concretev base 2, are-locatedout- Wardly beyond the side wallsl 4 'betweenfthe flanges 6, and are secured to said walls by rivets 9. i

- Horizontally vdisposed. angle bar brackets y'10 are arranged inwardly of the side walls 4, and are secured to said side walls by rivets 11. The

so i

brackets 10 extend from. the front edges of the sidewalls 4 to the rear .Wall 3, and are provided in their horizontal members withglongitudinally extending series of openings-12. -Hinge lugs 13 `rest upon the bracketsl() and areeach secured in place by a pair of bolts 14. As eachrof the brackets 1Q is provided with-a longitudinally extending series ofopenings 12, through a pairv of which the bolts 14 of each hinge lug 4r13k pass,

the hinge lug is capableof adjustmenthorizontally toward andl away fromthe rear `Wall The door 5 is carried byr straps l5 which are) l provided at their lower ends vwith hinge lugs 16 connected to the hinge lugs V13 by pintle 1'7.,` .The door 5 is secured in closed or raised positionlby bolts 18 which are slidably carried by the hinge straps 15 for movement -into v and out of engagement in analined pair lof the series of openings V19formed in the side walls 4.Y Thegbolts 18 N are yieldingly held in projected position,` by

springs 20 andare adapted toibe retracted from in engagement with the side `walls 4 through the medium `of handles 21;l

horizontally alinedv andthe -handles 21-thereof are ,arranged at their inner or adjacent endsl so as to permitboth of the bolts to be simultaneously. retracted by one hand. Due tothe adjustable mounting'of thehinge knuckles 13 and-tothe provision ofthe, side walls 4 with' lthe series of openings 19,t hedoor 5 may be secured in'closed or raised positionat different distances from the .rear wall 3, whereby to adapt the machine for making blocks of different' thicknesses. An angle bar 22, adapted to support the `door 5 in horizontally opened or lowered The bolts 18 are position, extends across the front edgesofrthef side walls 4 with its horizontal member arranged in aplane below the pintles 7, and is secured to` the front flanges 6 by bolts 2 3.l

The Vmold is provided with a core plate 24 which is removably secured to the rear wall 3 and to one of the side walls 4 by bolts 25. The core plate 24 has horizontally ofset portions 24 and 24h. tion 24h, and the latter portion is located rear` wardly of the former. necting portion 24z of the core plate Y24, is rounded at its points of juncture with the portions 24a and 24h.

A face plate 26 is carried by the door 5 and extends therefrom to the lower edge of the core plate24. The face plate 26 is secured to the door 5 by an angle bar bracket 2'? to which it is secured by bolts 28 and which is secured to the door by bolts 29. VThe door 5 is provided with vertical series of bolt receiving openings 30 `in which it will be subjected when the block ma-A terial isbeing tamped, supports 31 are provided for the rear edge'of the face plate, one of the supports being arranged adjacent one side edge 4of vthe faceplate and the other adjacent' the other side'edge thereof. The supports are in the form of bolts, and are threadedlyA engaged with bars 32 arranged below the face plate 26 and secured to the side walls 4. The supports vposition of the plate;

pallet 33.

scratched or -otherwise unfit for further use, and to permit wear plates of diierent sizes to be substituted for the others when adjusting'the mold for blocks of diierent sizes.

With the door `V5 closed and'secured in positionby Vthe bolts 18, and after the concrete has been Y poured into the space between the door and core plate l24, Athe lconcrete is lamped by any suitable apparatus of the electric motor operated type.`

After the tampin'g operation, the boltsl8 are` retracted and the door 5 is lowered onto. its rest' orrsupport 22, as clearly shown in Figure 7'." The block which is of the formshown in Figu-re 9, may now be removed easily.` As the door 5Y is 'mounted for adjustment and latching at dilerent -distancesfrom'thecore plate 24, blocks of diiferent thicknesses may be made. Asl the face plate 26 is secured to the door 5 for vertical adjustment thereon, blocks of diierent widths may be made. In other words, by adjusting'the door 5 with respect to the core plate 24 and by adjusting the face plate 26 upwardly of different sizes, the size of the wear plates' The portion 24a is longer than the por-r The intermediate or conany adjusted- Y These we ar pla-teni are (removably. lsecured in place bybolts 36 to permit the wear plate 34 and wear plates 35 to be renewed when used in the machine depending solely on the size cf the block tobe made. 'Y

The block comprises a thick horizontal member or gutter portion 37 and a thick vertical member or curb portion 38. The gutter portion 37 is of narrow polygonal formation in plan, and the curb portion 3 extends transverselyof and Yupwardly from the rear end of the gutter portion. The curb portion 38 is equal in height to the thickness o1" the gutter portion 37, and its thickness is greater than its height. AThe curb portion 38 gradually decreases in thickness outwardly Viroma pointslightly above the gutter portion 37 so as to reinforce the portions at their point vof juncture. This thickened part 39 is concave to effect better drainage and clearing of the gutter. As the block is of 'elongated polygonal formation in plan,-it maybe easily and quickly laid and laid at comparatively small cost.V Due to the relative proportions of the parts thereof, the blocks are exceptionally strong, durable and efiicient.

While I'have described the principle of 'the Y invention, together with the structure which vI now consider to be the best embodiment thereof, wish it understood that the structure shownv is merely illustrative and that such chang-es may be made' when desired as are Within the` scope of the invention as claimed. l

What claim is:

-1. A mold of the character set forth, comprising a mold having a rear lvvall and'lside wal-1aV horizontal brackets secured to the inner surfaces of the side walls, hinge lugs arranged on AtheY brackets for adjustment toward and away from the rear wall, means for securing the hinge lugs in an adjusted position, hingestrapspivotally connected 7to the hinge' lugs, a door secured to the hinge straps, latch bolts carried by the door and engageable with the side walls to secure the door in closed position, a core plate securedv within the mold, a face plate, means securing the face plate to the door foradjustment thereon, and adjustablersupporting elements'for the rear edge of the face plate. l

2.' A mold for plastic blocks lcomprisingl a rear wall, side walls extending from saidrear Vwall, a frame having a cross bar secured at its ends Yagainst frontedge'portions of said vside walls .and

side bars extendingy into the mold and secured against inner faces of the side walls, said frame serving to brace the mold and its cross bar hav, ing an outwardly projecting flange, a front Wall constituting a door fitting between vthe side walls, hinges 'for vsaid door having straps secured vertically against the outer face :of the door vand lugspivoted to thestraps and resting upon said side bars, said lugs being releasably secured to the side bars for adjustment toward and away from the rear wall and Said straps being yadapted to rest upon vthe flange of the -cross bar and support the doorwhen the door is swung downwardly to an open position, a face plate projecting from said door and having depending Aattaching means at `one end detachably secured against the door for adjustment of the face plate vertically in the mold, means for releasably v'securing the door in an upright closed position, and means Vin the'mold to engage beneath the VVface plate and support the frame at its inner CHARLES H. Ro'rrnmnvn.V

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